尽管即使在高温下三氯甲烷亚苄基苄酯也不会重排为亚砜,但在温和的条件下,相应的茴香基酯在己烷中会重排为对-茴香基三氯甲基亚砜。在相似条件下用氯仿取代己烷,导致生成p-茴香酰氯和二氯磺化为主要反应产物。通过使用更多的极性溶剂和更高的温度,可以增强此过程。在苄基和苯甲基酯在各种溶剂中加热时,也观察到了三氯甲烷亚磺酸盐向氯化物的转化,尽管速率不同。两种重排均建议通过电离机理进行。取决于反应条件和底物的性质,次磺酸根阴离子可与阳离子复合以生成亚砜,或进一步离解为二氯磺基和氯离子,从而生成苄基氯。对S N 1型机制进行亚磺酸盐重排的观察似乎是独特的。
Synthesis of mono- and disubstituted sulfines via β-elimination of chloroform from trichloromethyl sulfoxides
作者:Samuel Braverman、Dan Grinstein、Hugo E. Gottlieb
DOI:10.1016/s0040-4020(97)00904-6
日期:1997.10
A new method for the synthesis of thioaldehyde and thioketone S-oxides by an unusual base-induced β-elimination of chloroform from readily available allylic and benzylic trichloromethyl sulfoxides is described. The reaction proceeds smoothly under mild conditions. The facile preparation of α,β-unsaturated sulfines by the new method is of special interest. A possible mechanism for this remarkable sulfine
Braverman, Samuel; Grinstein, Dan, Phosphorus, Sulfur and Silicon and the Related Elements, 1994, vol. 96, # 1-4, p. 321 - 322
作者:Braverman, Samuel、Grinstein, Dan
DOI:——
日期:——
The rearrangement of benzylic trichloromethane-sulfenates to sulfoxides and chlorides
作者:S. Braverman、B. Sredni
DOI:10.1016/s0040-4020(01)97107-8
日期:1974.1
While benzyl trichloromethanesulfenate undergoes no rearrangement to sulfoxide even at high temperatures, the corresponding anisyl ester rearranges to p-anisyl trichloromethyl sulfoxide in hexane under mild conditions. Substitution of hexane by chloroform under similar conditions, lead to the formation of p-anisyl chloride and dichlorosulfine as main reaction products. This process is enhanced by the
尽管即使在高温下三氯甲烷亚苄基苄酯也不会重排为亚砜,但在温和的条件下,相应的茴香基酯在己烷中会重排为对-茴香基三氯甲基亚砜。在相似条件下用氯仿取代己烷,导致生成p-茴香酰氯和二氯磺化为主要反应产物。通过使用更多的极性溶剂和更高的温度,可以增强此过程。在苄基和苯甲基酯在各种溶剂中加热时,也观察到了三氯甲烷亚磺酸盐向氯化物的转化,尽管速率不同。两种重排均建议通过电离机理进行。取决于反应条件和底物的性质,次磺酸根阴离子可与阳离子复合以生成亚砜,或进一步离解为二氯磺基和氯离子,从而生成苄基氯。对S N 1型机制进行亚磺酸盐重排的观察似乎是独特的。
A novel synthesis of monosubstituted sulfines via an unusual β-elimination of chloroform from allylic and benzylic trichloromethyl sulfoxides
作者:Samuel Braverman、Dan Grinstein、Hugo E. Gottlieb
DOI:10.1016/s0040-4039(00)76009-6
日期:1994.1
A new method for the synthesis of thioaldehyde S-oxides by base-induced elimination of chloroform from allylic and benzylic trichloromethyl sulfoxides is described. The reaction proceeds smoothly under mild conditions. A mechanism for this remarkable sulfine synthesis and apparently unprecedented β-elimination of chloroform is presented.